and now we have as i mentioned the stable environments to attract the foreign investments, yes. we will work together. we will produce. we exert more efforts in order to develop, in order to find the solution for our economical crisis. >> warner: waleed el haddad, thank you for joining us. you can watch all of our monday interview with opposition leader mohammed el-baradei. find a link on our home page. >> ifill: now, a second look at a science story that captured headlines this year. the federal government has taken new steps to limit some of the research it does with chimpanzees, which have long been the source of hope and debate. but questions remain about whether those experiments should occur under any circumstances. "newshour" science correspondent miles o'brien reports. >> reporter: there are no other animals quite like them, except us. they share 99% of our d.n.a. and it shows. they scheme, plot and fight. they care for their babies and they grieve their dead. and they love a good game of catch. as i discovered, queenie had little patience for my wild pitches. >> did you